... Carbon steel,alloy steel or high speed steel.Contents:1) Metric size 9 taps: M3x0.5,M4x0.7 ... .759 dies: size as taps1 die wrench O/D 25mm1 T-tap wrench M3-122) Inch size 9 taps: ... 6-32,8-32,10-24,12-24,1/4- ... 20,5/16-18,3/8-16,7/16-14,1/2-139 dies: size as taps1 die wrench O/D 1"1 ... T-tap wrench 1/16-1/2 20pcs tap ...